RE: Memory problems with Xpose

From: [email protected] [mailto:[email protected]] On Behalf Of Toufigh Gordi Sent: Friday, January 13, 2012 10:53 AM To: 'Justin Wilkins' Cc: [email protected] Subject: RE: [NMusers] Memory problems with Xpose Hi Justin (and others), My computer has 3GB, running Windows 7 on a 32 bit machine. The interesting thing is that this is happening in the middle of a modeling project and so far there have been no issues. I have now tried it on an XP machine with 4GB of Ram and get the same message there. Interestingly, the whole folder with about 50 tested models and associated files is only 360 MB, so my RAM is over 10 time that. My R version is 2.14.0 (2011-10-31). I'll see if a newer version is available. Toufigh From: Justin Wilkins [mailto:[email protected]] Sent: Friday, January 13, 2012 1:23 AM To: Toufigh Gordi Cc: [email protected]<mailto:[email protected]> Subject: Re: [NMusers] Memory problems with Xpose Dear Toufigh, I guess you've got a relatively large model and/or dataset - R has bumped up against its memory limit under your version of Windows (which I'm assuming you're using based on the error message). Which version are you using? 32-bit or 64-bit? To support what Andy and Jeroen have suggested, the solutions are typically to get more RAM, upgrade R, upgrade to a 64-bit OS if you aren't already running on one, or to reduce the scope of the problem. You could accomplish the latter by running the parameter vs covariate comparisons by hand, or by doing them in smaller batches. See help(xpose.prefs-class) for details related to changing the definitions of the parameters and covariates in the Xvardef section of an Xpose data object - shortening the vectors of parameters (parms) and covariates will reduce the dimensionality or the problem. You could also try upping the memory limit (using memory.limit), but this may not work. There's a short discussion of Windows memory limits in R here: http://cran.r-project.org/bin/windows/base/rw-FAQ.html#There-seems-to-be-a-limit-on-the-memory-it-uses_0021 Hope this helps! Best Justin On Jan 13, 2012, at 9:28 AM, Toufigh Gordi wrote: Hi, I am trying to plot model parameters vs. covariates suing Xpose. The data file is rather large and I get the following message: In initialize(value, ...) : Reached total allocation of 1535Mb: see help(memory.size) 2: In initialize(value, ...) : Reached total allocation of 1535Mb: see help(memory.size) Error in print(parm.vs.cov(.cur.db)) : error in evaluating the argument 'x' in selecting a method for function 'print': Error: cannot allocate vector of size 171 Kb Can anybody offer a remedy? Thanks! Toufigh -- Justin Wilkins, PhD Exprimo NV Tel: +41 (0) 81 599 23 82 Mobile: +41 (0) 76 561 09 49 E-mail: [email protected]<mailto:[email protected]> Web: http://www.exprimo.com/ This e-mail is confidential. It is also privileged or otherwise protected by work product immunity or other legal rules. The information is intended to be for use of the individual or entity named above. If you are not the intended recipient, please be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. You should therefore delete this message from your computer system. If you have received the message in error, please notify us by reply e-mail. The integrity and security of this message cannot be guaranteed on the Internet. Thank you for your co-operation. This electronic transmission may contain confidential and/or proprietary information and is intended to be for the use of the individual or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this electronic transmission is prohibited. If you have received this electronic transmission in error, please destroy it and immediately notify us of the error. Thank you.